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            <small>
              <a href="#Procedure">Procedure<br></a>
              <a href="#Abstract">Abstract<br></a>
              <a href="#Required_Reading">Required_Reading<br></a>
              <a href="#Keywords">Keywords<br></a>
              <a href="#Brief_I/O">Brief_I/O<br></a>
              <a href="#Detailed_Input">Detailed_Input<br></a>

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              <small>               <a href="#Detailed_Output">Detailed_Output<br></a>
              <a href="#Parameters">Parameters<br></a>
              <a href="#Exceptions">Exceptions<br></a>
              <a href="#Files">Files<br></a>
              <a href="#Particulars">Particulars<br></a>
              <a href="#Examples">Examples<br></a>

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              <small>               <a href="#Restrictions">Restrictions<br></a>
              <a href="#Literature_References">Literature_References<br></a>
              <a href="#Author_and_Institution">Author_and_Institution<br></a>
              <a href="#Version">Version<br></a>
              <a href="#Index_Entries">Index_Entries<br></a>
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<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void wnfetd_c ( SpiceCell    * window,
                   SpiceInt       n,
                   SpiceDouble  * left,
                   SpiceDouble  * right   ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Fetch a particular interval from a double precision window. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   <a href="../req/windows.html">WINDOWS</a> 
 </PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
 
   WINDOWS 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   window     I   Input window. 
   n          I   Index of interval to be fetched. 
   left, 
   right      O   Left, right endpoints of the nth interval. 
</PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
   window      is a window containing zero or more intervals. 

               window must be declared as a double precision SpiceCell.

   n           is the index of a particular interval within the 
               window.  Indices range from 0 to N-1, where N is the
               number of intervals in the window.
</PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
   left, 
   right       are the left and right endpoints of the nth interval 
               in the input window.   
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   1) If the input window does not have double precision type,
      the error SPICE(TYPEMISMATCH) signals.

   2) If n is less than zero, the error SPICE(NOINTERVAL) is 
      signaled. 
 
   3) If the interval does not exist, i.e., n &gt;= <a href="card_c.html">card_c</a>(&amp;window)/2, 
      the error SPICE(NOINTERVAL) signals. 
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   None. 
</PRE>
<h4><a name="Particulars">Particulars</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
 
   Let window contain the intervals 

      [ 1, 3 ]  [ 7, 11 ]  [ 23, 27 ] 

   This window has a cardinality of 6 ( N=3 intervals), so 'n' may have
   value 0, 1, or 2, (n &lt; cardinality/2)

   Then the following calls 

      <b>wnfetd_c</b> ( &amp;window,  0, &amp;left, &amp;right );    (1) 
      <b>wnfetd_c</b> ( &amp;window,  1, &amp;left, &amp;right );    (2) 
      <b>wnfetd_c</b> ( &amp;window,  2, &amp;left, &amp;right );    (3) 

   yield the following values of left and right 

      left         right 
      ---------    --------- 
      1            3 
      7            11 
      23           27 
</PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Author_and_Institution">Author_and_Institution</a></h4>
<PRE>
 
   N.J. Bachman    (JPL)
   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
 </PRE>
<h4><a name="Version">Version</a></h4>
<PRE>
   -CSPICE Version 1.0.2, 30-JUL-2007 (EDW)

      Removed erroneous description in the Examples section 
      indicating &quot;Undefined&quot; as a return state after an error
      event caused by an invalid value of n.
 
   -CSPICE Version 1.0.0, 22-AUG-2002 (NJB) (WLT) (IMU)
</PRE>
<h4><a name="Index_Entries">Index_Entries</a></h4>
<PRE>
 
   fetch an interval from a d.p. window 
 </PRE>
<h4>Link to routine wnfetd_c source file <a href='../../../src/cspice/wnfetd_c.c'>wnfetd_c.c</a> </h4>

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   <pre>Wed Jun  9 13:05:33 2010</pre>

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